Liquid level responsive float suspension



June 19, 1956 N. KNECHT LIQUID LEVEL RESPONSIVE FLOAT SUSPENSION Filed Jan. 28. 1953 INVE R. NORMAN K CHT BY i ATTORNEY.

United States 2,751,178 LIQUID LEVEL RESPONSIVE FLOAT SUSPENSION Norman Knecht, Philadelphia, Pa., assignor to Minueapolis-Honeywell Regulator Company, Minneapolis,

inn, a corporation of Delaware Application January 28, 1953, Serial No. 333,730 3 Claims. (Cl. 248-317) The present invention relates to liquid level responsive apparatus of the known type, shown, for example, in the Binckley Patent 1,966,537, of July 17, 1934. Apparatus is suspended and facilitating its removal from the displacer chamber. The provision of a suitable connector through which the suspended from the arm the upper end of the cage is removed, and can then be engaged by a hook drawn upward and out of the cage along with the displacer. The suspension device disclosed and claimed herein is desirably character- The various features of novelty which characterize my invention are pointed out with particularity in the claims For erence should be had to the accompanying drawings and descriptive matter in which I have illustrated and described a preferred embodiment of the invention.

atent Q 0f the drawings: Fig. 1 is an elevation tached to a stationary, vertically disposed member I. The outer end of the torque tube G is anchored to the mem- Advantageously, the anchoring connection between the outer end of the torque tube G and member I that the left of the arm E as seen in Fig. 3. This permits the member F, when not locked to the arm E, to be moved straight up into a position in which the out of the aperture 6.

Patented June 19, 1956 3 portion of the section 1 at some distance above the arm E. The portion of the strip 11 immediately above the pin 9 is bowed to the left away from the end of the arm E, as seen in Fig. 2. As shown, a thin metal strip 12 having an elongated upper portion alongside and welded or otherwise attached to the bowed portion of the spring strip 11, has its lower end portion reversely bent to form an uprising projection spaced away from the spring part 11 to the left.

To detachably connect the lower portion of the member Flto the displacer A, the latter is formed with an axial stem 13 having an enlarged upper end 14. The stem 13 extends through an aperture 15 formed partly in the inclined intermediate section 2 and partly in the horizontal bottom section 3 of the member F. The width of the lower portion of the aperture 115 is a trille greater than the diameter of the lower portion of the stem 13 but is less than the diameter of the enlarged upper end portion 16 of the stem. Thus it is not possible to separate the displacer A from the member F when the weight of the float is suspended from the horizontal portion of the member F. However, after being disconnected from the arm E and lowered relative to the stem 13 until the enlargement 14 is alongside the aperture portion 16, the member F may be disconnected from the displacer A by movement of said member to the left as seen in Fig. 2 until said member is at the left of the stem 13 and its enlargement 14 is at the right of the adjacent portion of the member F. Ordinarily the member F will not be disconnected from the displacer A until. the latter has been withdrawn from the housing section or cage member B.

To remove the displacer A for inspection, cleaning or repair purposes, the pressure in the housing section is suitably reduced and the closure b is removed. A screw driver or like element may then be passed down into the tubular section B until its lower end is between the part 11 and the uprising extension 12. Thereafter the screw driver may be moved horizontally to move the projection 11 away from the arm E until the projection 10 is withdrawn from the opening 9 in the tooth 7. When the connector F is thus disconnected from the arm E, the displacer A may be drawn up out of the chamber B through the upper end of that chamber, as by means of a hook (not shown) extending through an opening 17 in the upper end of the section 1, as may be seen from Fig. 2.

As those skilled in the art will understand, the cage space or chamber surrounded by the wall B is ordinarily connected by equalizing connections to a vessel or liquid reservoir, one of which opens to said space at a level above the normal liquid level in said space, while the other opens to said space at a level which ordinarily is at least as low as the lower end of the displacer A. The tubular branches C may serve as the equalizing connections. When the apparatus is in operation, the globular portion 14 having a hemispherical surface on the lower side is permitted to freely move in the lower portion of the aperture 15 without danger of becoming disengaged. Any surges in an upward direction are prevented from being applied to the arm E by the fact the stem 13 is free to move upwardly for a short distance. These factors all add to protecting the apparatus and making it universally useful.

While in accordance with the provisions of the statutes,

I have illustrated and described the best form of embodiment of my invention now known to me, it will be apparent to those skilled in the art that changes may be made in the form of the apparatus disclosed without departing from the spirit of my invention as set forth in the appended claims and that in some cases certain features of my invention may be used to advantage without a corresponding use of other features.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A suspension device comprising a vertical upper section, a horizontal lower section, and an inclined intermediate section, and formed with an upper aperture .including a portion within said vertical section and a portion within said intermediate section, and formed with a portion of the vertical section of said device extending partially into said upper aperture, and formed with a lower aperture comprising a portion within said horizontal section and a portion within said inclined section, the portion of said lower aperture in said inclined section being of first cross sectional area, the portion of said lower aperture in said horizontal section being of a second cross sectional area less than said first cross sectional area, and the intermediate portion of said lower aperture between said first and second cross sectional areas forming a con necting channel whose width is less than any coresponding cross sectional dimension of said first or second cross sectional areas. a

2. A device as claimed in claim 1 wherein the portion of the vertical section extending into the upper aperture has an opening in the lower portion thereof, and an elongated spring member fastened at one end to the upper vertical section above said aperture and extending outwardly and downwardly therefrom in the direction of said inclined portion, and having its other end extending back and adapted to project through said opening.

3. A device as defined in claim 2 wherein said spring has an upwardly extending hook member fastened thereto on the side thereof away from said vertical section, said hook providing a means for removing said other end of said spring from said opening.

References Cited in the file of this patent UNETED STATES PATENTS 

